That 15 mins earlier everynight plan is an urban myth IMO. I've been struggling with delayed sleep patterns my entire adult life and if it was that easy it would be fixed already. Mine really is a sleep cycle delay, I've tried getting up earlier to reset the thing but I just end up hung over and unable to function for the first couple of hours. My life would be perfect if only school/work/life started at 10 or 11 am lol. I'm investigating some light box therapy.